* {
	padding: 0;
	margin: 0;
}

.main {
	position: relative;
	width: 200px;
	margin: 10px auto;
	list-style: none;
	font-size: 24px;
	color: #000;
}

.item {
	height: 2em;
	padding: 0 20px;
	text-align: center;
}

.item a {
	display: inline-block;
	line-height: 2em;
}

.cover {
	height: 2em;
	position: absolute;
	left: 50%;
	transform: translateX(-50%);
	background-color: rgba(22, 22, 204, 0.5);
	transition: all 0.3s ease-in-out;
}
